During CNN's Senate impeachment trial coverage on Wednesday, Sen. Joe Manchin (D-WV) discussed his earlier comments about 2020 Democratic presidential candidate former Vice President Joe Biden's son Hunter Biden's relevancy as a witness in the Senate's impeachment trial by stating that the witnesses need to be "relevant" and it's "immaterial" whether or not he thinks Hunter Biden is a relevant witness. He added that if there is a dispute about Hunter Biden's relevancy as a witness, Supreme Court Chief Justice John Roberts should be the person who is charged with deciding which witnesses are relevant.